Improvement in lathes for turning hubs



2Sheets--Sheet1.

D. KAVANAUGH.

Lathes for Turping Hubs.

$10,156,166, Patented 0ct.20,1874.

WITNE ES INVENTOR THE GRAPHIC CO PHOYD-LITNJQI- 4| PARK PLACEJLY.

v 2 Sheets--Sheet 2. D. KAVANAUGH. Lathes for Turning Hubs.

No.156,l66. Patented 0ct;2o,1a74.

y a j i 2 y i 'e' ff] )7 W TNESS S 'INVENTOR Attorneys UNITED STATES PATENT OFFICE.

DANIEL KAVANAUGH, or ORAIGSVILLE, NEW YORK.

IMPROVEMENT IN LATHES FOR TURNING H UBS- Specification forming part of Letters Patent No. 156,166, dated October 20, 1874; application filed July 11, 1874.

To all whom it may concern:

Be it known that I, DANIEL KAVANAUGH, of (Jraigsville, in the county of Orange and State of New York, have invented a new and valuable Improvement in Lathe for Turning Hubs; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawing is a representation of a side View of my hubboring machine. Fig. 2 is a sectional view of the same, and Fig. 3 is a front view.

This invention has relation to machines which are designed for turning wheel-hubs; and it consists, mainly, in a vertically-movable sash having bits or cutters applied to it, in combination with a verticallyadjustable sash having a rotary cutter and trimming and finishing cutters; also, in novel devices for operating and manipulating the verticallymovable sash, as hereinafter more fully set forth.

In the annexed drawings, A designates the main frame of the machine, and A the workin g-table at the front of this frame. B B designate head and tail stocks, the one, B, having applied to it a chuck or hub-holder, a, and the other, B, carrying an adjustable back-center, a. On the spindle of the holder a a pulley, b, is applied, around which a belt, 11 passes, that communicates rotary motion to the holder from a pulley, 12 on an overhead shaft, 0. The two stocks B B are secured upon the table A and connected together by a slotted bar, 0, which affords support for two tool-rests, c 0 carrying cutters 0 0 for trimming and finishing the ends of the hubs. D designates a rotary roughing cutter, for preparing the stuff to be acted on by the finishing-cutters, hereinafter explained. This cutter D has its end bearings in a vertically-adjustable sash, E, which is raised by an operator pressing on a treadle, E, and which descends by its own gravity. The cutter D receives rotation from a shaft, F, by means of a large pulley, e, a belt, 0 and two small pulleys, c and another pulley, 6 After the stuff is confined between the holder at and center a, and the work of roughing or rounding it is completed, it is given the final shape by means of cutters g, which are adjustably secured to cross-pieces g on a sash, G. The sash receives vertical movements between two guides, A A and this motion is given to it by means of a spurwheel, (1, acting on a rack, d. The wheel (1 is keyed on a horizontal shaft, H, on one end of which is a belt-wheel, h, around which a belt, h passes, that also passes around a beltpulley, W, on a shaft, I. Shaft I receives rotation from a main driving-shaft, J, by means of pulleys and a belt, and this (I) shaft communicates rotary motion to the shaft F by means of pulleys and a belt, shown in Fig. 1. A pulley, t, on the shaft I, a pulley, j, on the shaft (J, and a belt, k, are employed for giving rotary motion to the shaft which drives the spindle of the holder or. The pulley j on shaft G is caused to engage with this shaft by means of a clutch, l, by adjusting which pulley j can be caused to run fast or loose, as may be required. K designates a bolt, which passes freely through one of the uprights of frame A and through one of the vertical guides A, and which is acted on by a spring. During the descent of the sash Gthe inner end of the bolt K presses against one edge of this sash, and at the termination of the ascending stroke of the sash G the bolt will be shot beneath the sash. The outer end of bolt K is pivoted to an angular lever, L, which is also pivoted to a connecting-rod, R. The rod R is pivoted to a vertical vibrating arm, S, working in a guide, r, and contructed with an upper forked end carrying an anti-friction roller. When the sash G is fullyraised and bolt K is shot beheath it by spring .9, the upper end of arm S will be moved away from belt h and by allowing this belt to run loose on its pulleys stop the further ascent of the sash G. During the descent of the sash G the upper end of arm S will press hard against the belt h and keep it tight on its pulleys.

What I claim as new, and desire to secure by Letters Patent, is-

l. The spring-bolt K, pivoted to the angular lever L, the connecting-rod R, and the vertical vibrating arm S, Working in guide 7', in combination with the vertically-movable sash Gr, for the purpose set forth.

2. The combination of the Vertically-adjust hereunto subscribed my name in the presence able sash E, carrying the rotary cutter D, the of two Witnesses. vertically-movable sash G, with adjustable cutters g, and the trimming and finishing cut- DANIEL KAVANAUGH' ters 0 operating substantially in the manner Witnesses: as described. JAMES BOLAND,

In testimony that I claim the aboveI have JOHN H. BUCHANAN. 

